16685166685 has 32 divisors (see below), whose sum is σ = 22400146944. Its totient is φ = 11825472000.

The previous prime is 16685166653. The next prime is 16685166689. The reversal of 16685166685 is 58666158661.

16685166685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16685166685 - 2⁵ = 16685166653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685166689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2298732 + ... + 2305978.

It is an arithmetic number, because the mean of its divisors is an integer number (700004592).

Almost surely, 2^16685166685 is an apocalyptic number.

It is an amenable number.

16685166685 is a deficient number, since it is larger than the sum of its proper divisors (5714980259).

16685166685 is a wasteful number, since it uses less digits than its factorization.

16685166685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8325.

The product of its digits is 12441600, while the sum is 58.

The spelling of 16685166685 in words is "sixteen billion, six hundred eighty-five million, one hundred sixty-six thousand, six hundred eighty-five".